IOC: Russians face action over Sochi doping

"The investigation concerns mechanical defects of doping sample bottles, mentioned in the second part of an independent commission of the World Anti-Doping Agency headed by Richard McLaren", the CCSFR said.

The International Olympic Committee (IOC) told TASS on Friday that it would not be making public the names of Russian athletes, who had been subjected to the disciplinary procedures earlier in the day by the world's governing Olympic body.

In the case of the 28 athletes being investigated, there was "evidence of manipulation of one or more of their urine samples" collected at the 2014 Sochi Games for doping tests, it said.

McLaren found that 28 of the 95 samples his team studied had signs of "manipulation", said the IOC.

McLaren detailed vast state-backed cheating in Russian sport that included swapping athletes' tainted samples for clean urine through the testing laboratory at Sochi. In addition, doping tests of two more Russian athletes, who won four gold medals of the 2014 Sochi Olympics had been falsified as well.

The IOC has sanctioned 27 Russian athletes so far as the result of a previous re-analysis program for the Olympic Games in Beijing 2008 and London 2012. All Russian samples from the 2010 Vancouver Winter Games are also to be re-tested. But former sports minister and current Deputy Prime Minister Vitaly Mutko was banned from attending the Rio Olympics this year because of the controversy.